Peter Freeman. The Zimmermann Telegram Revisited: A Reconciliation of the Primary Sources. Cryptologia, 30(2):98-150, 2006. [doi]
@article{Freeman06,
title = {The Zimmermann Telegram Revisited: A Reconciliation of the Primary Sources},
author = {Peter Freeman},
year = {2006},
doi = {10.1080/01611190500428634},
url = {http://dx.doi.org/10.1080/01611190500428634},
tags = {source-to-source, open-source},
researchr = {https://researchr.org/publication/Freeman06},
cites = {0},
citedby = {0},
journal = {Cryptologia},
volume = {30},
number = {2},
pages = {98-150},
}